Where is the OBU installed?
3 Answers
OBU is installed in the upper middle part of the car's front windshield. OBU is a microwave device that uses DSRC technology to communicate with RSU. The function of OBU is to use DSRC technology to establish a microwave communication link with RSU, enabling vehicle identification and electronic toll collection without stopping the vehicle, thus realizing unmanned vehicle channels without stopping or taking cards. OBU consists of a host and peripherals. The host includes motherboard components, video components, differential GPS components, GPRS module, WLAN card, power supply, power amplifier, heat sink, housing, and wiring harness. The peripherals include keyboard, LCD display, in-car LED, external LED, GPS antenna, GPRS antenna, driving recorder, passenger flow counter, and other expansion devices.
The OBU is typically installed on the upper part of the car's windshield, near the rearview mirror area. I've installed it several times, and this location is the standard choice because the windshield is designed to be thin and transparent, minimizing obstruction of the OBU's signals and ensuring smooth communication with toll station antennas. When installing, choose the right angle to avoid blocking the driver's view and compromising safety. Use specialized adhesive to secure it firmly, preventing loosening due to driving vibrations. Some people may try to take shortcuts by placing it on the dashboard or side window, but this weakens the signal and can lead to toll payment failures. Regularly keep the windshield clean, as excessive dust can interfere with recognition. If installed incorrectly, you may encounter issues on highways, wasting time and requiring manual intervention. In short, choosing the right position ensures the ETC system operates efficiently, saving time and effort. When changing vehicles, reinstall the OBU to match the new car's characteristics.
The OBU is best installed near the rearview mirror on the windshield. I understand that this location offers the strongest signal reception because the glass material allows microwave signals to penetrate easily without interference from metal structures. Ensure it is securely fixed during installation to prevent detachment or poor contact due to vibrations. Avoid placing it in areas with dark tinted film, as the film can absorb signals and affect performance. If accidentally placed on the dashboard, the signal may become unstable, leading to frequent malfunctions. Regularly wipe dust off the device surface to ensure smooth card reading. Proper installation positioning can enhance ETC efficiency and avoid delays at highway entrances. In actual driving, a fixed position ensures quicker and more convenient access at toll stations. Refer to the vehicle manual or consult a professional repair shop for optimal installation advice—safety first is the core principle.
